"Oh, Snyder said something semi-intellectual about Batman? Must be true. Let's make every character admit it."
Instead of, you know, realizing that's the Joker's take and, like you said, Tim would never feel the same way.
It's funny how much better of a job Batman Incorporated is doing with exploring the theme (and Morrison has been working with it since RIP). It's not about making him less effective. It's about giving him new priorities. Snyder gets that. The "family" is a distraction. It gives him a humanity that he otherwise wouldn't have. It gives him something to love over Gotham itself. But Snyder would never have a character say, "Killing us will make Batman stronger" because that's not true at all. Killing the family, at this point, would drive Batman crazy. Hell, realistically Bruce would probably just kill himself. Or at the very least retire. Killing the family would effectively be killing Batman.
This is the main problem with these cross-title events. Most of the ancillary writers misinterpret the entire point.